Navigating table



.July 3Q9 y1935. a. K. o. LUNDBERG NAVIGAT I NG TABLE Filed Sept. 2l, 1933 2 Sheets-Sheet 1 Ego Klas OSKCU Lundberg iNv'ELNTOF u @www July 30, 1935. B. K. o. LUNDBERG 2,009,407

NAVIGATING TABLE Filed Sept. 2l, 1953 2 Sheets-Sheet 2 5 Klas @skaf LU ndbeva |N VEN-VCEl @mML UQ; TTY.

Patented July 30, 1935 l NAVIGATING. TABLES Bo .Klas Oskar Lundberg, Linkoping, Sweden Application Septemlerz'l, 193,3'Seijizt`l` 1510.690382 In Swedenevrila5f193a^:.1: l

. -4 claims.- .(c1. 33;-.719 y Y .jIfheprresent inventionjrelates to improvements Qfshowsj thesameviewedfrom above in in navigating tables for air-#craftv and ships, prothe; position illustrated inFigure 6. vided with a mapholder with map 'or sea; chart,A jt'ljhetable properjlfconsists Vof 1a planedisc, and and a rule, limbfor thelike, its particular `'object constitutesj" suppotffor afrolljmaptor the like' 5 being so to ldesign the' apparatus'- that apil'ot runningoverlth 'dededges'g and rolled up 5,

or a helmsinan may carry "out the "geometricv o 1Lle is"3 Th undedtedges may be replaced,A problems necessarytfor navigation by position b ollers *4u M gure 4),'to` reducefthe friction'. fixing or thelike, such'as marking courses and thi'table isffdisposedarectangularwframe 5,; bearings, angles of drift or the like, by using one which, by means Aor bolts 6 running through the 10 hand only. table one in each corner, is secured to a bottom 10 It is necessary for this purpose that the rule 'I which may be xed to the aircraft or the ship. or the like used for the marking may be exactly The frame 5 is provided on its underside with held in the required position on the table, and a layerof rubber or some other material having that it be released and moved to a new position a great -coeflicient of friction. The bolts 6 beand xed there again, by a simple manipulatween the table and the bottom I carry springs 8 15 tion. Provisions for such purpose are known, which press the table against'the frame. On the but they present as a rule the disadvantage that underside ofthe table is located a wall I0, and on they darken a large part of the underlying map the bottom I a wall 9, which walls are so aror the like, and they are very often considerably ranged relatively to each other that the stopping complicated, whereby the various operations candevice, indicated by the triangle II in Figure 2, 20 not be carried out with the required ease and may beplaced between them.` The rule I2, which security. is preferably transparent, is provided with a han- The object of the present invention is to redle for easy manipulation, said handle being stamove the said disadvantages, and the invention tionary or slidable along the rule, and clamped is characterized in that a frame is located on the between two side pieces of the"frame in the po- 25 table between the side pieces of which the map, sition shown in Figure 1. the sea chart or the like, or a portion of these, The stopping device consists of `a main catch is placed, and which thus will not darken any I5 and an auxiliary catch II, which are mounted portion of the map etc. each on its own Vbolt I6, I8 secured to the wall I0 The invention is further characterized in that connected to the table. The catches, each under 30 the table is yieldingly or resiliently mounted the action of its own spring (not shown), tend'to relatively to the frame so that the rule or the move in a counterclockwise direction (Figure 5). like inserted under two sides of the frame may The main catch has an upper stop face I9, a be clamped between the table and said sides, and lower notch 20, and a projection 2|. The auxilt v be released and moved only when actuated by iary catch is provided with atstop face 22. Bolts 35 the hand. Further, means are provided to hold I3, I4 are located on vthe wall 9. the table rmly in a depressed position relative The apparatus operates in the following manto the frame to facilitate the manipulation and ner. When the rulel2 is in the clamped posiexact adjustment of the rule, for releasing the tion, and thus the table has been moved with 40 table from the said stopping position and for rerespect to the frame 5 the stopping device as- 40 turning the same to the clamping position. Thus, sumes the position shown in Figure 5. When a pressure impulse is used in order to release and the table is depressed the main catch I5 actuated Y clamp the rule, which impulse must be the most by the spring is turned so that the stop face I9 natural and comfortable which the hand grasping comes under the bolt I3 on the wall 9v of thel the rule is able to exert. frame, as illustrated in Figure 6. Thus the table 45 An embodiment of the invention is illustrated is stopped in this intermediate position, and the 1 in the accompanying drawings in which: released rule may now be moved at pleasure.

Figure 1 is the navigating table viewed from Upon the further depression of the table the proabove with the rule clamped, jection 2l strikes against the bolt I4, and thus Figure 2 is a longitudinal section, and the main catch is turned so that its stop face I9 50 Figure 3 a cross section of the same. -is brought out of contact with the bolt I3,` and Figure 4 is a modified detail. its notch 20 engages the stop face 22 of the spring- Figures 58 show the stopping device in lateral actuated auxiliary catch I'I. The table has now view, partly sectioned, in four dierent positions, reached its bottom position (Figure 7), and, when and n t the pressure on the same ceases, is returned to 55 the clamping position by the springs 8. The notch 20 maintains during said procedure its engagement with the stop face 22, and thus holds the catch l5 out of the stopping position until the stop face I9 has cleared the bolt I3, whereupon the two catches are freed from each other by the catch I1 striking against the bolt Il (see Figure 8).

Of coii'r's'e the ekct is bbtrai'ni l ch tm catches are 'connected 'with the fi'ane, th two bolts cooperating with the catches are connected with the table.

Having now described my invention,` what I claim as new and desire to secure by Letters Patent is:

1. In a navigating instrument, ,a vertically mov able table carrying a chart, aai'n on said table and surrounding at least a'prtion im th @man rem 2. An instrument in accordance with claim I in which said stopping mechanism consists of a spring actuated main catch connected with said table and having a stop face, a stop mounted on said frame and cooperating with said stop face to arrest said table in a lowered position, a second stop on said frame, a, projection on said catch cooperating with said second stop to release said Stop face from the vIirst mentioned stop, and' an auxiliary spring actuated catch cooperating with said main catch under the control of 3. fn a navigating instrument of the character Y tbed, 'artabl foi'` a. chart, a frame superimposed upon said table and surrounding at least a nti'n'of the 'chart to be observed, a resilient admi 'S @Sm im f5 4. In a. navigating instrument of the character y 

